This paper presents preliminary experimental results of non-equilibrium plasma assisted combustion of low BTU fuels. The air flow and the fuel flow are separated by two co-axial tubes in which the air flow is excited by dielectric barrier discharge (DBD) plasma. A non-premixed simple jet flame is observed immediately when the DBD plasma-excited air flow mixed with the fuel flow. The measurements of the flame indicate that addition of a very small amount of energy in the form of DBD plasma can provide self-ignition in harsher conditions in contrast to usual spark ignition, and significantly improve the flame stability and combustion efficiency. The results also show that the effect of DBD plasma on the flame is most efficient in combustion at low equivalence ratios, and the chemical reactions can even occur at the equivalence ratios well below the lean flammability limit.

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